Treat any plane advertised as "A Great Trainer" with skepticism and compare it to Jester S1's checklist before buying. While there are many genuine great trainers out there, there are also many that are advertised as such but in reality, are far from it. For the most part, kit and ARF manufacturers are in the business to sell you their product, not necessarily to teach you how to fly it. And some of the unscrupulous ones freely use deceptive catch-phrases such as "The Perfect Trainer" or "Flies 100mph" to make their plane attractive to the newbie.
Like everything else these days, "Buyer Beware" applies to r/c planes too!
Harvey